const: constify remaining dev_pm_ops

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 92ff88a..7679aee 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1148,7 +1148,7 @@
 	return drv->restore ? drv->restore(sch) : 0;
 }
 
-static struct dev_pm_ops css_pm_ops = {
+static const struct dev_pm_ops css_pm_ops = {
 	.prepare = css_pm_prepare,
 	.complete = css_pm_complete,
 	.freeze = css_pm_freeze,